The last time Tiger Woods won a golf tournament was 2013. Once the world's top player, he's struggled with a myriad of health issues and off-the-course distractions. But he's back and close to winning again.

Saudi Arabia's Crown Prince begins a tour of the U.S. next week to try and drum up foreign investment. That may be a hard sell after 200 princes and wealthy businessmen were detained at a luxury hotel in Riyadh for three months as part of the prince's anti-corruption campaign.

Cobalt used to be a byproduct of copper mining, used in everyday, boring stuff like tires and magnets. Now it's one of the most important and sought after metals on the periodic table. This has implications for big tech firms like Apple.